| 摘要 |
A yarn tension device of the type including three rollers mounted freely rotatably on a support housing, at least one of these rollers being subjected to the action of an adjustable permanent-magnet braking system (or magnetic brake), and the yarn, during its movement being deflected around the periphery of the rollers, the movement of the yarn upstream and downstream of the tension assembly being executed in a common direction called the "running axis". The rollers are mounted on the support housing in such a way that: first and second rollers, called "entry rollers" are arranged in the vicinity of the yarn introduction zone such that their axes are on either side of the running axis and are maintained in contact, at least one of these rollers having an adjustable braking device; and a third roller, called an "exit roller", itself is positioned downstream of the first and second rollers in the direction of travel of the yarn, its surface being tangent to the running axis.
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